Lines have now reopened following earlier trespassers on the railway at Reading.
As service recovers, trains may still be cancelled, delayed by up to 25 minutes or revised.
This incident is expected to continue to impact services until the end of the day.
South Western Railway customer advice:
For further information or onward travel advice, please speak to a member of staff or use a station help point.
If you would prefer to use local buses to continue your journey, please check Traveline. South Western Railway tickets are not valid on local buses unless stated above.
Check before you travel:
You can check your journey using the National Rail Enquiries real-time Journey Planner.
Compensation:
You may be entitled to compensation if you experience a delay in completing your journey today. Please keep your train ticket and make a note of your journey, as both will be required to support any claim.